PHOENIX - Television footage shows dozens of police officers in Arizona's biggest city entering a building where police say people are injured.
Numerous emergency vehicles are at the scene. Video footage showed a person being taken out on a gurney.
Reached at the scene, another spokesman, Sgt. Tommy Thompson, said he couldn't yet say what happened.
Numerous people at the complex could be seen watching from balconies.
Fire engines and police vehicles and at least one ambulance were outside the complex.